<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="AddRoleDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开区 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级跟三级权限 -->
              <el-col :span="19">
                <!-- 通过 for循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                    <!-- <i class="el-icon-close"></i> -->
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引区 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-search"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形插件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="AddRoleDialogVisible"
      width="40%"
      @close="addRoleDialogClosed"
    >
      <!-- 内容主体 -->
      <el-form
        :model="addRoleForm"
        :rules="addRoleFormRules"
        ref="addRoleFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称:" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>

        <el-form-item label="角色描述:" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 内容底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editRoleDialogVisible"
      width="40%"
      @close="editRoleDialogClosed"
    >
      <!-- 内容主体 -->
      <el-form
        :model="editRoleForm"
        :rules="editRoleFormRules"
        ref="editRoleFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称:" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>

        <el-form-item label="角色描述:" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 内容底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolesList: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,

      //所有权限的数据
      rightslist: [],

      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },

      //默认选中的节点ID值数组
      defKeys: [],

      //当前即将分配权限的角色ID
      roleId: '',

      //添加用户对话框 显示/隐藏
      AddRoleDialogVisible: false,

      //添加角色表单
      addRoleForm: {},

      //添加角色表单验证
      addRoleFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名称',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          }
        ]
      },

      //编辑角色信息
      editRoleForm: {},

      //编辑角色对话框的显示与隐藏
      editRoleDialogVisible: false,

      //编辑角色对话框信息的规则
      editRoleFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名称',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          }
        ]
      }
    }
  },

  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }

      this.rolesList = res.data
      // console.log('this.rolesList ==>', this.rolesList)
    },

    //根据Id删除对应的权限
    async removeRightById(role, rightId) {
      //弹窗提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('您取消了本次删除权限行为!')
      }

      //   console.log('确认了删除');
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }

      role.children = res.data
    },

    //点击展开分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id

      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }
      //把获取到的权限数据保存到
      this.rightslist = res.data

      console.log('this.rightslist ==> ', this.rightslist)

      //递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },

    //通过递归的形式, 获取角色下所有三级权限的ID 并保存到defKeys 数组中
    getLeafKeys(node, arr) {
      //如果当前 node 节点不包含children属性 则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },

    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },

    //点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log("keys ==>", keys);
      const idStr = keys.join(',')
      //   console.log('idStr ==>', idStr)

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }

      this.$message.success('分配权限成功!')

      //重新刷新数据
      this.getRolesList()

      //隐藏对话框
      this.setRightDialogVisible = false
    },

    //添加角色对话框的关闭
    addRoleDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
    },

    //添加用户
    addRoles() {
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) {
          return
        }

        //可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addRoleForm)

        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败!')
        }

        this.$message.success('添加角色成功!')

        //隐藏添加角色的对话框
        this.AddRoleDialogVisible = false

        //重新获取角色列表数据
        this.getRolesList()
      })
    },

    //根据ID删除对应角色数据
    async removeRoleById(id) {
      // console.log("ID ==> ", id);

      //弹框询问用户是否确认删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色,是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('您本次取消了删除角色!')
      }

      const { data: res } = await this.$http.delete('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败!')
      }

      this.$message.success('删除角色成功!')

      this.getRolesList()
    },

    //根据角色Id编辑角色信息
    async showEditDialog(id) {
      // console.log('showEditDialog ==>', id)

      const { data: res } = await this.$http.get('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('获取编辑角色信息失败!')
      }

      this.$message.success('获取编辑角色信息成功!')

      this.editRoleForm = res.data

      //显示编辑用户框
      this.editRoleDialogVisible = true
    },

    //编辑角色对话框的关闭
    editRoleDialogClosed() {
      this.$refs.editRoleFormRef.resetFields()
    },

    //点击按钮 添加编辑用户信息
    editRoles() {
      this.$refs.editRoleFormRef.validate(async valid => {
        // console.log('editRoles.valid =>', valid)

        if (!valid) {
          return
        }

        const {data: res} = await this.$http.put('roles/' + this.editRoleForm.roleId, {
          roleName: this.editRoleForm.roleName,
          roleDesc: this.editRoleForm.roleDesc
        })

        if (res.meta.status !== 200) {
          this.$message.error('编辑新角色信息失败!');
        }

        this.editRoleDialogVisible = false

        this.$message.success('编辑新角色信息成功!');

        this.getRolesList();
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
